Improved machine for refitting conical valves



initcd taic @met dimite.,

Lette/rs .Patent No. 91,478, dated .Tune 15, 1869.

IMPROVE!) MACHINE FOR REFITTING- CONICAL VALVES.

The Schedule referred to in these Letters Patent and making part of thesame.

To all whom it may concern I Be it known that I, ISAIAH NUTT, of thecity, county, and State of New York, have invented a new and usefulImprovement in Machines for Retting Valves, of which thefollowingis afull, clear, and exact description, reference being had to theaccompanying drawing, forming part ot"` this specificatiom'and in4capable of feed through a slot. in the concave, for action 'in oragainst the valve, asI the latter is rotated within the concave.

Referring to the accompanying drawing- A :represents the frame of themachine, which is made to carry, at its one end, a stationary .concaverest or guide, B, the samebcing a hollow cone made smooth on itsinterior, and having a longitudinal slot,

e, cut through-it on the one side, which slot may extend the length ofthe cone, for thereabouts.

lfbewother end of the frame carrles :tn-adjustable centre, C, which. isarranged in line with the centre of the concave, and which serves, inconnection .with the concave, to centre and hold the valve D to bereiitted, as represented in tig. l, the bearing-portion, s, of thevalve, or the valve proper, as it may be termed, resting on and beingguided by the smooth inteliorV surface of ,the stationary concave B,Rotary motion is communicated to thevalve by a ratchet-brace applied tothe adj nstable centre, Vthrough a fork connecting the latter vwith thevalve, or in any othersuitable manner, and said valve, whilst beingrotated, borne up against the interior of the concave.

y E is the cutter, which may either be straight or concave ou itscutting-edge, and, lying loosely on a support, ll,'s proected throughthe slot a, in the concave,

up against the valve, by means of a lever, G, with which said cutter maygear through a pin, b, on its face, being made to lit or enter any oneot' a series of notches c, in the lever, according to the diameter: ofthe valve to beoperated on; but such adjustment is, or may be dispensedwith, where the edge of the valve s is straight, instead of convex, andthe cutter, having a straight cutting-edge, be constructed to extend thefull le'ngth of the slot a, or thereabouts.

In such latter case, said cutter, by reason of the length of itscutting-nose or end, will answer for various diameters of valves withoutadjustment along the support F, and, as it is important that itscuttingedge should at all times be in line or parallel to the side oithe concave B, it projects through or into, it may be guided in its feedup against the valve, by setting it to slide within a recess in thesupport F, as indicated by red lines in fig. 1, or it may be otherwisesuitably guided.

From this description, it will be seen, that while the valve is at oncereadily adjusted to'insure its being reitted true, it is both guided andsupported by the smooth interior surface of the stationary concave B.This 1s in no way analogous to a revolving concave mill, whichnecessitates the use of an additional centre, and presents severalcutting-edges that cannot be sharpened, to suit diiierentshaped edges tothe valve, as can a. single detachable cutter as employed in this, mymachine.

Such previous machines, in fact, have not been adapted to relit valvesof al rounded form on their edge, for which form of valve my inventionis particularly applicable.

What is here claimed and desired to be secured by Letters Patent, is-

The combination, with the adjustable centre C, and stationary concave B,constructed smooth on its interior, to form a rest and guide for thevalve, of the sliding cutter E, arranged to puoject through a slot, a,in the concave, substantially as specilied.

ISAIAH NUTT.

Witnesses Flinn. HAYNEs, Enwn. ADAMS.

